It may not have a “mount” or “volcano” anywhere in its name, but the islands of Santorini (aka Thira) are actually the site of one of the largest volcanic eruptions in recorded history! That’s a pretty good reason why there isn’t much land left above the sea when you visit the island chain from above. The islands that you see today are actually the remains of the ancient volcano’s caldera that erupted over 3,500 years ago, and the blast itself is estimated to have been up to 120 times more powerful than the 1980 eruption of Mount St.…